If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
72 = 5*b+3*b+8 // - 5*b+3*b+8
72-(5*b)-(3*b)-8 = 0
72-5*b-3*b-8 = 0
64-8*b = 0 // - 64
-8*b = -64 // : -8
b = -64/(-8)
b = 8
b = 8
| t+9+2t=36 | | 11+x/3=28 | | 61=5n+3n+5 | | a-7+3a=13 | | -n+5+3n=19 | | -4=5w-6w-7 | | 4(x+5)+3x+18=94 | | 54=2w-7w+9 | | -2t+3-3t=23 | | 5-3d-4d=-2 | | 44=5a+a-10 | | 4+3x+6x=112 | | -t+10+2t=14 | | -4w-5+w=-38 | | 6-3a+7a=-22 | | 7t-8+4t=-129 | | 6b+4-b=49 | | -4k+6-4k=14 | | 5+4k-6k=-13 | | -6-7b+4b=-12 | | 31=6k-3k-2 | | 7x-10+3x=-130 | | 5+3d+5d=-19 | | 8-2t+4t=0 | | -7a-7+5a=11 | | 7-3w-3w=19 | | -3b+8+5b=-6 | | 4n+5+4n=-27 | | 7n+3-n=27 | | d+3-5d=31 | | -30=-4m+m+3 | | -5a+10-5a=10 |